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Circuit arrangement and method for starting up a circuit arrangement

a circuit and circuit technology, applied in the field of circuit arrangement, can solve problems such as export control of cryptographic hardwar

Inactive Publication Date: 2008-04-03
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a problem faced by manufacturers of mobile radio components and platforms, who are often required to integrate cryptographic hardware in their components to meet security requirements. However, the functionality of the components cannot be provided in its entirety at the time of export, and the current security standards require a key length of at least 128 bits for symmetrical encryption and 1 Kbit for asymmetric encryption, which are subject to export restrictions. The patent text proposes a solution to this problem by developing a method for accessing and starting up a circuit arrangement that allows for the secure and efficient use of cryptographic hardware in mobile radio components and platforms.

Problems solved by technology

However, cryptographic hardware may be subject to export control.

Method used

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  • Circuit arrangement and method for starting up a circuit arrangement
  • Circuit arrangement and method for starting up a circuit arrangement
  • Circuit arrangement and method for starting up a circuit arrangement

Examples

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Embodiment Construction

[0018] Embedded systems such as a chip for a mobile radio platform, or in other words for a mobile radio communication device, are confronted ever more frequently with security requirements which are normally satisfied by integrating cryptographic hardware in the components, for example the chips.

[0019] Cryptographic hardware, that is to say by way of example processors designed specifically for cryptographic functions, or specific electronic circuits, are normally subject to export control and the export regulations of the so-called Wassenaar Arrangement.

[0020] The Wassenaar Arrangement relates to technologies which can be used both for military purposes and for commercial purposes, and includes a set of rules with which the participant states comply, or in other words to which the signatory states to the Wassenaar Arrangement are bound. The Wassenaar Arrangement relates, for example, to encryption methods when using a key length of more than 56 bits.

[0021] As has been described...

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PUM

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Abstract

A circuit arrangement has a crypto unit which provides at least one cryptographic function. An access monitoring interface is also provided in order to check an access request from an application computer program to a cryptographic function of the crypto unit. The access monitoring interface is designed such that it checks whether the application computer program is authorized to access the cryptographic function, and the cryptographic function is called only if it is authorized to do so.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims priority to German Patent Application Serial No. 10 2006 046 456.7, which was filed Sep. 29, 2006, and is incorporated herein by reference in its entirety. TECHNICAL FIELD [0002] Embodiments of the invention generally relate to a circuit arrangement, to a method for starting up a circuit arrangement, to a method for operating a circuit arrangement, and to computer program products. BACKGROUND OF THE INVENTION [0003] Embedded systems such as a chip for a mobile radio platform, or in other words for a mobile radio communication device, are confronted ever more frequently with security requirements which are normally satisfied by integrating cryptographic hardware in the components, for example the chips. However, cryptographic hardware may be subject to export control.BRIEF DESCRIPTION OF THE FIGURES [0004] Exemplary embodiments of the invention will be explained in more detail in the following text, and are illustr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L9/32H04L9/14H04L9/30
CPCH04L9/32G06F21/72H04L9/3247H04L9/3263H04L2209/12H04L2209/603H04L2209/80
Inventor JENNINGS, GERARD DAVIDBRANDL, HANS
Owner INFINEON TECH AG
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